Iranian Supreme Leader Ayatollah Ali Khamenei may have hinted his disapproval over an historic phone call between President Barack Obama and Iranian President Hassan Rouhani.

Khamenei said some parts of Rouhani's trip to the United Nation's headquarters in New York were "not appropriate," leading some to believe he sided with critics of the 15-minute phone call between the two presidents.

That phone call ended a three-decade-long silence between the two countries. But many Islamists, including commanders in Iran's powerful Revolutionary Guard, said the president went too far by reaching out to the U.S. administration.

Nevertheless, Khamenei reiterated his support for Rouhani's outreach to the West.